Two-cycle explosion-motor.



H. SCHEIT.

TWO CYCLE EXPLOSION MOTOR.

APPLICATION FILED JULY 10, 1907.

1,015,909. I Patented Jan.30,1912.

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Specification of hettershatent.

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To all whom it may concern:

Be it known that I, HERMANN ScH IT, a subject of the Emperor of Germany, r esid ing in Dresden-Strehlen, in the Empire o-t Germany, have invented certain new and useful Improvements in Two-Cycle Explosion-Motors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will on able others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings,

and to letters or figures of reference marked thereon, which form a part of this specification. This invention relates to multi'cylinder internal combustion engines and has as an object the production of-such anengine in which the expulsion of the residue of combustion and the introduction of a fresh charge into each cylinder takes place by means of a reduction of pressure in the rear of the piston of another cylinder. In this way the thorough scavenging of thecylinder is secured. 4

Another advantage is that the combustible mixture does not enter the crank chamher before passing into'the .motor cylinder, with the result that the mixture is not contaminated with lubricating oil.

lhe drawing shows a vertical axial crosssection of a two'cylinderengine embodying my invention.

In each cylinder there is a combustion chamber 1 and a closed crank case In each combustion chamber or cylinder 1 is a reciprocating piston 3, having a connecting rod 4, which is pivotally conncc to a corresponding crank 5 of the main shaft 6. Each combustion chamber 1 has an inlet passage 7 controlled by an inlet valve 8, which isnormally closed by means of a con'mrc-ssion spring 9 of such strer th as to yield to the di'llercnre between the of the su jiply of combustible mixture inlet 10 and the pressure which exists in the combustion chamber after exhaust, as herein after described. For each combustion chamher there is an exhaust outlet 11, pi'e jerably opening out of the chamber near its forward. end, so as to be uncovered by the piston at the end of the rvorking stroke. in each t haust passage 11, as shown, there is an haust valve 12, which is nori'nally main tained closed by means of a spring t cam 14 for each unit. and cam rod nected to the valve 12 operate'to open the exhaust valves 12 atv the proper intervals. These valves 12 and the ports'il which they control. will hereinafter be lniown as" the main exhaust valves-and ports. Each combustion chamber is also provided with lafsupplementary exhaust port 16, placed a little in advance of the main'jexhaustporWso as to be uncovered by the corresponding piston just after the main port is uncovered. From the exhaust port 16 of each cylinder a passage 17 leads to an inlet or suction port- 18 in the crank case or vacuum chamber 2 of the other unit. Each passage 17 as shown, is controlled. by. a valve 23, which is actuated by means of a cam 24: follower 25 and a follower rod 26.

well-known cross-over engines, serve to clear the combustion chambers of burned gases having l The corn -f bustlon cylinders are cross-connected to the by sucking the residue of the exploded charge therefrom. Each crank case or vacuum chamber 2 is provided with an outlet port 19, in which is a. check valve 20 opening outward. These valves are maintained normally closed by compression springs 21.

In describing the operation of this engine it will be assumed that a compressed charge has been exploded in the lefthand combustion chamber and that expansion of the products at combustion has advanced the piston that the port 11 has been uncovered and the valve 12 has been opened to permit the escape of the burned gases until the pressurein the combustion chamber is reduced nearly to that of the atmosphere. Following this, the supplementary exhaust -port 16 has been uncovered andthe valve 12 closed. At the point of the stroke illustrated in the drawing, which is subsequent to the closing of the main exhaust port 11, the valve 23 is open. As illustrated the righthand piston is compressing a charge in the combustion chamber, so that the space of mber 2 of the righthand cylthe vacuum or ind-er which is available to receive gas is ex- The suction due to consupplied worn any suitable source-to the assage 1G is drawn into tthe residue of the burned charge combustion chamber 1 With the' he lefthand cham er.

a met:

1 have thus described specifically an embodiment of my invention in order that its operation may be clearly understood. However, I do not limit myself to the exact details oi the device disclosed.

i Vhat I claim and (lESiIQ to secure by Letters Patent is:

1. .l'n a two-cycle engine, a plln'ality of nomeoe port in each cylinder, a supplementary exhaust port and passage connecting each cyl incler to the crank case of another unit, means for controlling the admission port, means for opening and closing the main on haust port, means for opening the supplementary exhaust port subsequently to the openingof the main exhaust port and for closing the supplementary exhaust port.-

8. In a two cycle engine, a plurality of units, each. having a cylinder andi-a crank case, an admission port, a main exhaust port in each cylinder, a passage connecting units, each having; a cylinder and a crank 1 case an admission port, a main exhaust port and a supplementary exhaust port in each cylinder, a passage connecting the supple inentary exhaust portof each cylinder with the crank case of another unit, means for-controlling the admission port, means for opening'antl closing the main exhaust port, and means for opening and closing the supplementary exhaust port subsequently to the ole. g of the main exhaust poet.

in two-cycle engine, a plurality oi units, eaeh inclueling a cylinder and a crank case, an admission port anci a main exhaust the supplementary exhaust port of each cylinder with the crank case of another unit, a non return valve for controlling the admis sion port, means for opening and closing the air exhaust port, and means for opening and closing the supplementary exhaust port subsequently to the closing of the main. exhaust port.

In testimony that I claim the foregoing my invention, I have signed. my name in presence of two subscribing Witnesses.

HER-MANN SCHEIT. Witnesses:

Osman Knonz,

VVALTnn CHILIAN. 

